diff --git a/src/Filter/UnsignedInt.php b/src/Filter/UnsignedInt.php
index 800b33c..a39a3ac 100644
--- a/src/Filter/UnsignedInt.php
+++ b/src/Filter/UnsignedInt.php
@@ -26,12 +26,19 @@ final class UnsignedInt
      */
     public static function filter($value, bool $allowNull = false, int $minValue = null, int $maxValue = PHP_INT_MAX)
     {
-        if ($minValue === null) {
-            $minValue = 0;
-        } elseif (is_int($minValue) && $minValue < 0) {
+        return Ints::filter($value, $allowNull, self::validateMinValue($minValue), $maxValue);
+    }
+
+    private static function validateMinValue($minValue) : int
+    {
+        // IFF a user chooses not to include $minValue, or passes null, mandate it returns to 0.
+        $minValue = $minValue ?: 0;
+
+        // Validate that the minimum value is positive.
+        if ($minValue < 0) {
             throw new \InvalidArgumentException("{$minValue} was not greater or equal to zero");
         }
 
-        return Ints::filter($value, $allowNull, $minValue, $maxValue);
+        return $minValue;
     }
 }